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Toshiba Satellite Pro A120 (PSAC1) User Manual

Page 199

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User’s Manual

Glossary-12

Glossary

R

Radio frequency interference (RFI) shield: A metal shield enclosing the

printed circuit boards of the printer or computer to prevent radio

and TV interference. All computer equipment generates radio

frequency signals. The FCC regulates the amount of signals a

computing device can allow past its shielding. A Class A device is

sufficient for office use. Class B provides a more stringent

classification for home equipment use. TOSHIBA portable

computers comply with Class B computing device regulations.

Random Access Memory (RAM): High speed memory within the

computer circuitry that can be read or written to.

restart: Resetting a computer without turning it off (also called "warm

boot" or "soft reset"). See also boot.

RGB: Red, green, and blue. A device that uses three input signals, each

activating an electron gun for a primary additive color (red, green,

and blue) or port for using such a device. See also CRT.

RJ11: A modular telephone jack.
RJ45: A modular LAN jack.
ROM: Read Only Memory: A nonvolatile memory chip manufactured to

contain information that controls the computer’s basic operation.

You cannot access or change information stored in ROM.

S

SCSI: Small Computer System Interface is an industry standard interface

for connection of a variety of peripheral devices.

SD card: Secure Digital cards are flash memory widely used in a variety of

digital devices such as digital cameras and Personal Digital

Assistants.

serial communications: A communications technique that uses as few

as two interconnecting wires to send bits one after another.

serial interface: Refers to a type of information exchange that transmits

information sequentially, one bit at a time. Contrast: Parallel

interface.

SIO: Serial Input/Output. The electronic methodology used in serial data

transmission.

soft key: Key combinations that emulate keys on the IBM keyboard,

change some configuration options, stop program execution, and

access the numeric keypad overlay.

software: The set of programs, procedures and related documentation

associated with a computer system. Specifically refers to computer

programs that direct and control the computer system’s activities.

See also hardware.

stop bit: One or more bits of a byte that follow the transmitted character or

group codes in asynchronous serial communications.